Blood in the urine, blood semen, need to go to the hospital for further examination, to clarify the specific causes.1, urinary tract infection infection, including urethral mucosa, seminal mound and other inflammation, can lead to local mucosal erosion and congestion. At this time the blood section mixed in the urine and semen, and manifested as blood in the urine, blood semen. Patients can be accompanied by urinary frequency, urgency, urination pain and accompanied by ejaculation pain symptoms. Urine routine, urine culture, semen routine and culture and other tests need to be carried out to confirm the diagnosis. 2, when there is a seminal mound or seminal vesicles and other lesions, such as stones or tumors can cause bleeding, blood mixed in the semen can be manifested as hematospermia. If tumors or stones in the seminal vesicles can also cause bleeding in the seminal vesicles, they can be mixed in the urine and manifest as hematuria. It is recommended to carry out ultrasound of the urinary system or CT examination of the pelvic cavity to further clarify whether there are related lesions.3. If you suffer from prostatitis, prostate hyperplasia, bleeding symptoms can also occur, which can be manifested as blood in urine, blood semen, accompanied by urinary effort, ejaculation weakness, or urinary diversion, nocturia, and so on. Prostate fluid examination and prostate ultrasound are needed, and urethroscopy is needed to clarify if necessary.